File:Chicago boom derrick.gif
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Size of this preview: 543 × 599 pixels. Other resolutions: 217 × 240 pixels | 552 × 609 pixels.
Original file (552 × 609 pixels, file size: 8 KB, MIME type: image/gif)
Summary
| Description |
English: "Chicago boom derrick" means a boom which is attached to a structure, an outside upright member of the structure serving as the mast, and the boom being stepped in a fixed socket clamped to the upright. The derrick is complete with load, boom, and boom point swing line falls. |
| Date | Unknown date |
| Source | https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_id=9832&p_table=STANDARDS |
| Author | Occupational Safety & Health Administration, U.S. Department of Labor |
Licensing
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Federal Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:04, 5 July 2014 | | 552 × 609 (8 KB) | wikimediacommons>Z22 | User created page with UploadWizard |
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